Agents-A1 vs GPT-5.5 Pro
Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
GPT-5.5 Pro leads for most workloads.
Based on BenchLM composite scores, July 2026.
Agents-A1
63
GPT-5.5 Pro
77
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Agents-A1 only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Category Radar
Head-to-Head by Category
Category Breakdown
| Benchmark | Agents-A1 | Δ | GPT-5.5 Pro |
|---|---|---|---|
| Agentic | 75.5 | → 14.6 | 90.1 |
| Knowledge | 47.6 | → 9.6 | 57.2 |
| Reasoning | 60.2 | — | — |
| Math | — | — | 52.4 |
| Inst. Following | 94.8 | — | — |
Operational Comparison
Agents-A1
GPT-5.5 Pro
N/A
$30 / $180
N/A
N/A
N/A
N/A
262K
1M
Quick Verdict
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Agents-A1 only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
GPT-5.5 Pro is clearly ahead on the provisional aggregate, 77 to 63. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro's sharpest advantage is in agentic, where it averages 90.1 against 75.5. The single biggest benchmark swing on the page is BrowseComp, 75.5% to 90.1%.
GPT-5.5 Pro gives you the larger context window at 1M, compared with 262K for Agents-A1.
Benchmark Deep Dive
Frequently Asked Questions (3)
Which is better, Agents-A1 or GPT-5.5 Pro?
GPT-5.5 Pro is ahead on BenchLM's provisional leaderboard, 77 to 63. The biggest single separator in this matchup is BrowseComp, where the scores are 75.5% and 90.1%.
Which is better for knowledge tasks, Agents-A1 or GPT-5.5 Pro?
GPT-5.5 Pro has the edge for knowledge tasks in this comparison, averaging 57.2 versus 47.6. Inside this category, HLE is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Agents-A1 or GPT-5.5 Pro?
GPT-5.5 Pro has the edge for agentic tasks in this comparison, averaging 90.1 versus 75.5. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
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